Yoke.



A. GUERINEAU.

YOKE.

APPLICATION' FILED MAR. 31,1914.

#Effi/Larrea' y mM-f THE NORRIS BUYERS w., PHOTO-LITHQ. WASHINGTON. D4 CA Patented Jun@ 8,1915.

2 SHEETS-SHEET 2.

THE NORIS PETERS co.. PHON-LITHO., WASHINGTON. D. C

ALEXIS GURINEAU, on CHOLET, Maman-LOIRE, FRANCE. i

YOKIE.

- Specification of Letters Patent.

Application iled March 31, 1914. Serial No.k 828,467.

T0 all 'whom it may concern: I

Be it known that I, ALEXIS GUERINEAU,

citizen of the Republicv of France, residing c.

at Cholet, Maine-et-Loire, France, have invented certain new and useful` Improvements in Yokes, of which the following is a specication.

My inventionr has fory its yobject to provide an improved yoke for yokingbeasts of burden. The yoke `is, particularly suitable for use in the form `of a double yoke and consists essentially in being constituted by two single yokes or` separate head pieces which are connected by a removable `cross piece towhich the draft member, such as a pole or the like is attached. The said cross piece is connected'to each head piece by; a pin and socket joint insuch a manner as to allow of the' cross piece oscillating in a horizontal direction about, the said; joint,

and also of allowing a certain amount of rotationon each head piece about'the axis of its joint. f

In a preferred construction, according to my invention, the joint between the removable cross piece and each head piece, instead of being fixed to the part (head piece or cross piece) which carries it, is jointed to the said part by a hemispherical joint so that the cross piece is enabled to make in addition to its oscillation about the saidjoint, also atransverse oscillation 4by the movement of the pins in or on the complementary parts of their hemispherical joints. All the oscillatory movements of the cross piece or of the headfpieces may be limited by kproviding stops between these elements of the yoke.

A practical embodiment/of my invention respectively on the lines A-A and B-B of Fig. 4, Fig. 5 showing the cross piece in its position of eXtreme inclination towardY the outside of the head piece shown in the same figure. ,l c l f j,

The complete yoke is composed of two separate head pieces A, each carrying at the center of its upper part a projecting pin a of a pin and socket joint for connection,rk

with across piece B, `to which there is attached by the usual means a draft member such as a pole C. In the eXample shown it is assumed that the pinl of the joint between the cross piece and the head pieces is carried by the head pieces. The socket of the joint may, as shown, be constituted' by a simple cylindrical cavity b corresponding in diameter to the pin a. rlhe cross .piece B is kept` on the pin a in the vertical` direction by means of a key D attachedv to the end of a pin Z1 on the crosspiece and adapted to engage in a corresponding recess al in,

thepin a. The `key itself may be held in a longitudinal direction by means of a flexible cord d, of leather or other material.

In the preferred practical construction the pins a, instead of* being rigidly fixed to the head pieces A are carried by Vone ofthe elements Efof a hemispherical. joint Fi' F, the other element of which isiixed tothe head piece. In this construction E is a hemispherical head and F is a cavity of corratentea Jane'sgieia.'

responding shapeformed in a plate G fixed l tothe head piece, for instance, by bolts g with sunken heads. joint E F bears preferably at its` center upon a metal support, for instance Vthe rounded head of a screw carried by the head piece for the purpose of keeping the ele; ment E in contact'with the cavity F. By means of this arrangement, when the cross piece B is Vplaced in position the key D can` enter the recess al without itrbeing necessary to raise the pin a. The top of the recess F is formed with a notch f through which the pin a extends. This notch allows of a fairly easy play of the pin a in the transverse direction and a somewhat greater play in the longitudinal direction of the head piece. In all these movements in ordery to avoid the pin a from striking abruptly against the bottom of the notch the cross piece B can be provided'with iron mountings such as H,

each of which forms a cap at its center for the element F of the hemispherical joint, and is adapted to move along the outer surface, which is likewise hemispherical, of this element, while the lower surfaces of its The element E of the v mounting H maybe varied at will.'A

ends are ,suitablyV extended and roundedso that inrolling vthey shall strike against ythe plate G before the pin a .shall have reached the 'end of the` notch .(F ig. The iron 1 parts f H may also have 'notchesia between" the sides of which there extend projectionsg1 of the plate Gr. Inr the constructionv shown,thelirongpart is fixed byfmeans of bolts z' to an iron mounting I fixed on theV topiof the cross piece B. 'It 'isto be'under stood that the manner of xing the iron It will be readily perceived that Vthe described construction allows 'iirstvof placing f the yokev rapidlyl onto and removing the same rfrom draft animals., In fact when the headpiecesl A have beenV attached to the anivmals iti's'ls'uiiicient inorder to assemble the yoke tos'lip the cross pieceB onto, the pins a and insert the Vkeys D into the recesses al.- Offcourse'care must be'. taken to attach the cross ypiece B so that the projections g1 will enter ther notchesh. The yoke once placed in positiona-ffords the following advant' tages The cross piece` B being capable of pivoting on the ypins a will yallow of relative 1 oscillation-ofthe heads of the animalsin the longitudinal direction and alsov allow of a limited play lof the heads about the geometricr axis of the joint between each head piece andthe crosspie'ce. Further,since Vthe pin informs onefpart of a hemisphericaljoint "the otherupa'rtr'of which is fixed to theele-k mentfcarrying the'saidpinythe said pin a willbe able to oscillate transversely and longitudinallyrinthe notch l" 5 howsthe crossfpieceLBv in its .extreme inclined position relatively toone of the Y' head pieces VV.The arrangementy of the projections gli in the notches i-of limited width serves to limit, as will be readily un-` derstood, thev horizontal oscillatory move `ment's'of the cross piece kB or the rotation of the head lpieces relatively to the cross piece.V

The diagram,- iug. e, Shows in iuii lines oner'ofthe extreme positions of .horizontaloscillation of they cross piece and in dot and dash lines the'other extreme position.v

The vconstructional features ofV my improved yoke have the following practical advantages t-Each of the animals yoked. ytherewith can move freely in various directions without the other'animal being incon-V different heights without eitheranimal be-l ingdistressed thereby; My improved yoke l allows als',`for'instance in plowing, of one animalwalking easilyonVV the top of the ridge? whiletheV` other' animal 'is' walkingY along thebottom of the furrow without the head of eitherV animal being. subjected to twisting strains. Finally the fact that my yokeis composed of a ycombinationfof twoY head" pieces-.and a yremovable ycross piece allows of fixing the head pieces upon the heads of the animals while they are in the stable,` each head'k piece being fixed sepa.

rately. rlhe cross piece Vmay also be re-V `moved instantaneously and thel animalsy may be allowed to keep their head pieces on 'while they are resting.

'In' cer-tain parts of the 'country a single ox l isiyokedY to' a cart bymeans of a yoke consisting kof a singleV head piece terminat-V ing ateach'fendin a woodenbar which is fixed toene of the two shafts of'thecart.

That lkind of yokingrhas the fs'ame draw" backs with thfe single oxvas those which are experienced Vwithoxen yoked in pairs with one fixedv yoke especially 'when Vthe two wheels ofthe cart arenot on the'same level.-

Now the improved rmethod of jointing' ac-r eording tomy invention can be' used with advantage in this case alsophy What A'I'claim'is 1. Ahead yoke-comprising separatehe'ad pieces, a common cross bai-,extending across the tops of the said' head'pieces, a universal joint between each head piece and s'aidfcross i bar, allowing saidcross barto oscillate bethV in a 'horizontal and vertical plane irelative toeach head piece,' and means Vfor limiting said oscillatory moveinentarhy 2. A. heacl yoke comprising separate 'head pieces,]a ycommon cross bar extending across the yto'psofthe said head pieces, afhemispherical joint between each headvpiec'e and said cross bar, allowing said `cross barV to oscillate in a kho'iiztnital and verticalv plane relative to each head piece, and means for limiting said oscillatory movements.Y a s f 3. A head yoke comprising separate head piecesjia common cross bary extending across thestop's of the said head pieces, a pinja'nd socket joint ybetweenV VeachV head piece and saidV cross bar; consisting'of a pin extending through said cross bar and having a hemispherical `head working inV a corresponding to allow said crossbar to o'scillat'eajbout` said pins and also to tilt in a vertical plane relativejto each head piece, and means for limiting the movementsfof said cross-bar. "-1. A headyokecomprising separate'head pieces, Aa common cross bar extending across the tops'of the said head pieces'a pin and socket joint between each head'n piece and said cross bar, consisting of a pin extending through said cross bar and having a hemispherical head working in a corresponding recess in thehead piece," and so arranged as to allow said cross bar to vturn aboutl said pins and also to tilt in a verticalplane rela#- 'Y ice Y lrecessfin'th'e head piece, and so arrangednas tive to each head piece, and stops on one In testimony whereof have affixed my oli; the relativelymovable pfarts for liming signa-ture in presence of tWo Witnesses. t e turning movements o said cross ar, the said spherical recess being provided ALEXIS GUERINEAU' 5 With notches whereby the tilting of said Witnesses:

\ cross bar in a vertical plane is limited by LOUIS' GARDET,

said pin striking the edges of said notch. HENRI MoRRIss.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

